PTSD symptom presentation across the deployment cycle.

Area of Science:

• Psychiatry
• Military Mental Health
• Trauma Studies

Background:

• Posttraumatic stress disorder (PTSD) symptom heterogeneity is not well understood in the early post-deployment period.
• Understanding symptom variation is crucial for etiological, prognostic, and clinical insights.

Purpose of the Study:

• To examine PTSD symptom heterogeneity in combat Marines during the early post-deployment phase.
• To identify typologies of PTSD symptom presentation over time.

Main Methods:

• Latent class analysis (LCA) was used on data from the Marine Resiliency Study (N=892).
• PTSD symptom presentations were assessed at one month pre-deployment and one, five, and eight months post-deployment.

Main Results:

• Symptom heterogeneity was present at all assessment points, with varying numbers of identified classes over time.
• Symptom patterns stabilized by eight months post-deployment, shifting from early fluctuations to distinct severity levels.
• Hypervigilance and exaggerated startle were common early post-deployment; flashbacks and amnesia were less frequent. Combat exposure, lifespan trauma, and avoidant coping predicted poorer outcomes.

Conclusions:

• Symptom variability is highest in the first month after deployment and subsequently stabilizes.
• Early post-deployment assessments may capture common, transient reactions like anxious arousal, potentially misrepresenting long-term PTSD trajectories.